Hmm . . . actually I can think of a few cooler things, but to each his own:

The only thing cooler than a pool party on a summer night in New York City is a secret pool party.

And the only thing cooler than that, as a few enterprising developers recently discovered, is a secret pool party in a pool made out of a Dumpster on the banks of the Gowanus Canal in industrial Brooklyn.

. . .

“The water’s amazingly fresh, for swimming in a Dumpster,” said Alexis Bloom, a documentary filmmaker from TriBeCa, after doing a few laps. She compared it favorably to the pool at Soho House, an actual urban country club.